An anonymous reader writes: Nature has advance word on the first science results from GRAIL, NASA's twin probes launched a year ago which are mapping the gravity of the Moon from lunar orbit. This is coming out in advance of any official publication or NASA release, so the data isn't available, but the story trails what the PI Maria Zuber told a Harvard CFA colloquium (http://www.cfa.harvard.edu/events/colloquia/fall12/zuber.html ) last week are some of the team's key scientific findings: including that the Moon's crust is substantially thinner than once thought; and some of the more speculative impact basins haven't been confirmed.

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